Well, I have gotten to say this is the longest surviving,

來源: Redfernbus 於 2022-10-19 13:12:52 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (172 bytes)

the most authentic and primitive, the original, the most commonly used method, which is still widely applied on a daily basis by human around the globe. 

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